[Full-disclosure] TELUS Security Labs VR - Symantec Antivirus Intel Alert Handler Service Denial of Service
TELUS Security Labs - Vulnerability Research
noreply at telus.com
Fri Jan 28 19:29:40 GMT 2011
Symantec Antivirus Intel Alert Handler Service Denial of Service
TSL ID: FSC20101213-06
1. Affected Software
Symantec Antivirus Corporate Edition 10.1.8.8000 and possibly prior
Symantec System Center 10.1.8.8000 and possibly prior
2. Vulnerability Summary
A denial of service vulnerability exists in Symantec Antivirus Intel Alert Handler service. Remote unauthenticated attackers can exploit this vulnerability by sending a malicious packet to the target service.
3. Vulnerability Analysis
The Alert Management System (AMS) component of Symantec Antivirus Corporate Edition installs an alert handler service, HNDLRSVC, that listens for commands from the AMS server. This service does not perform proper input validation of the command arguments while parsing parameters in the AMSGetPastParamList function. Remote unauthenticated attackers could exploit this vulnerability by sending a crafted packet, with overly long parameter size values, via the MSGSYS.EXE service on port 38292/TCP.
4. Vulnerability Detection
TELUS Security Labs has confirmed the vulnerability in:
Symantec Antivirus Corporate Edition 10.1.8.8000
Symantec System Center 10.1.8.8000
Disable the AMS service, or update to the non-vulnerable version of Symantec Antivirus 11.x series which does not include the vulnerable AMS component.
6. Vendor Response
Patches have been made available by the vendor to eliminate this vulnerability:
7. Disclosure Timeline
2009-10-01 Reported to the vendor
2009-10-20 Vendor response
2011-01-26 Coordinated public disclosure
Junaid Bohio of Vulnerability Research Team, TELUS Security Labs
10. About TELUS Security Labs
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